<div class="modal-body">
<form action="" method="post">
<div class="form-group">
<small>Name</small>
<input type="text" class="form-control" name="title" value="" placeholder="title"/>
</div>
</form>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Close</button>
<button type="submit" class="btn btn-primary" name="add">Save</button>
</div><?php
session_start();
if (!isset($_SESSION["username"])) {
header("Location:../adlogin");
}
?>
<?php include('../config/function.php'); ?><?php
session_start();
if (!isset($_SESSION["username"])) {
header("Location:../adlogin");
}
?>
<?php include('../config/function.php'); ?><?php
session_start();
if (!isset($_SESSION["username"])) {
header("Location:../adlogin");
}
?>
<?php include('../config/function.php'); ?>
<?php include('include/header.php'); ?>
<?php include('include/sidebar.php'); ?>?>
<?php include('../config/function.php'); ?><div class="col-6 d-flex justify-content-center">
Column
</div>
<div class="col-6 d-flex justify-content-center">
Column
</div><div class="row">
<div class="col-12">
<div class="col-6 d-flex justify-content-center">
Column
</div>
<div class="col-6 d-flex justify-content-center">
Column
</div>
</div>
<!DOCTYPE html> без него работает нормально 